CN115070037A - Method for enhancing Ti-Al series layered composite material by utilizing AlCoCrFeNi high-entropy alloy - Google Patents
Method for enhancing Ti-Al series layered composite material by utilizing AlCoCrFeNi high-entropy alloy Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 229910004349 Ti-Al Inorganic materials 0.000 title claims abstract description 47
- 229910004692 Ti—Al Inorganic materials 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000002708 enhancing effect Effects 0.000 title claims description 9
- 239000011888 foil Substances 0.000 claims abstract description 80
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000007731 hot pressing Methods 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 10
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
A method for reinforcing Ti-Al series layered composite material by utilizing AlCoCrFeNi high-entropy alloy relates to a method for reinforcing Ti-Al series layered composite material. The invention aims to solve the problems of low strength, poor plasticity and poor corrosion resistance of the Ti-Al intermetallic compound prepared by the prior art. The method comprises the following steps: according to the following steps: sequentially stacking a Ti foil, an Al foil, an AlCoCrFeNi high-entropy alloy foil (AlCoCrFeNi high-entropy alloy particles), an Al foil and a Ti foil to form a unit; one or more units are stacked from bottom to top and then placed into a mold, and the mold filled with the material is placed into a vacuum hot-pressing furnace for vacuum hot-pressing sintering to obtain the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material. The invention has simple preparation process and is expected to be widely used in the fields of navigation, aerospace, civil use, medical appliances and the like.
Description
Technical Field
The invention relates to a method for reinforcing a Ti-Al series layered composite material.
Background
The intermetallic compound has the advantages of high strength, high modulus and the like. However, most intermetallic compounds cause dislocation movement with difficulty at the time of deformation at low temperature, resulting in poor plasticity of the intermetallic compounds. Therefore, how to increase the toughness of intermetallic compounds is a main objective for the design of composite materials. In the middle of the nineties of the twentieth century, shells in nature are found to have a special layered structure with alternate brittleness and toughness. The U.S. developed Ti/Al with low density and high strength by imitating the special structure of shell 3 A Ti layered composite material. The successful development of the material preliminarily improves the problem of poor plasticity of intermetallic compounds, so that the material not only has Al 3 The high strength, high modulus and heat resistance of Ti, and the high plasticity of the tough material Ti are kept, and meanwhile, the composite material has a special layered structure and a failure mechanism different from other metals.
If the material design is carried out by imitating the special structure of the shell, on the basis of the layered structure, the advantages and the disadvantages of different materials in performance are made up according to the characteristics of different materials. The characteristics of the reinforcement, the material of the matrix, the volume fraction of the reinforcement, etc. are determined taking into account not only the anisotropy of the material but also the inhomogeneity. It is also necessary to consider what fabrication process is used to achieve an effective connection between the materials of the layers. Therefore, higher requirements are put on the design and preparation of the layered composite material.
The Ti-Al intermetallic compound prepared by the prior art still has the problems of low strength, poor plasticity and poor corrosion resistance.
Disclosure of Invention
The invention aims to solve the problems of low strength, poor plasticity and poor corrosion resistance of a Ti-Al intermetallic compound prepared by the prior art, and provides a method for enhancing a Ti-Al series layered composite material by utilizing AlCoCrFeNi high-entropy alloy.
The invention provides a method for preparing the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material with high strength, high toughness and high corrosion resistance, and the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material with low cost can be prepared at normal temperature and is easy to operate.
A method for enhancing Ti-Al series layered composite material by utilizing AlCoCrFeNi high-entropy alloy is completed according to the following steps:
firstly, respectively polishing Ti foil, Al foil and AlCoCrFeNi high-entropy alloy foil to remove an oxide layer on the surface, then ultrasonically cleaning, drying, and then, according to the following steps: sequentially stacking a Ti foil, an Al foil, an AlCoCrFeNi high-entropy alloy foil (AlCoCrFeNi high-entropy alloy particles), an Al foil and a Ti foil to form a unit; one or more units are stacked from bottom to top and then placed into a mold, and the mold filled with the material is placed into a vacuum hot-pressing furnace for vacuum hot-pressing sintering to obtain the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material.
The prepared finished material has the advantages that:
firstly, the single-phase Al of the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series laminated composite material prepared by the invention 3 Compared with other metal matrixes, the Ti matrix has higher elastic modulus (220GPa) and lower density, so that the prepared AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material also comprises Al 3 The Ti matrix has the advantages of high strength, low density, high modulus and other excellent mechanical properties;
secondly, the Ti-Al series layered composite material enhanced by the AlCoCrFeNi high-entropy alloy prepared by the invention has a special layered structure similar to shells, so that the material has special failure mechanisms of the layered material, including mechanisms such as interlayer cracking, crack deflection, brittle crack propagation and the like, and the prepared material has excellent impact resistance and energy absorption performance;
the interface between the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material prepared by the invention belongs to metallurgical bonding, and the formed interface has the advantages of high bonding strength, no defect and high quality, so that Ti and AlCoCrFeNi high-entropy alloys with better toughness show better toughening effect;
the metal materials of Al foil, Ti foil and AlCoCrFeNi high-entropy alloy foil (AlCoCrFeNi high-entropy alloy particles) used by the invention are easy to obtain, the preparation process and preparation technology are simple, and the production cost is low;
compared with common metal materials, the high-entropy alloy has the advantages of toughening due to the characteristics of short-range chemical order, lattice distortion and the like of the high-entropy alloy, and the optimal toughening effect can be achieved by regulating and controlling the proportion of each component of the high-entropy alloy;
sixthly, the AlCoCrFeNi high-entropy alloy selected by the invention and the matrix Al 3 The Ti material has good compatibility, and can form better metallurgical bonding by regulating and controlling parameters such as temperature, pressure and the like in the preparation process;
the invention has simple preparation process and is expected to be widely used in the fields of navigation, aerospace, civil use, medical appliances and the like.
The invention can obtain the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material.
Drawings
FIG. 1 is a preparation flow chart of the invention, wherein HEA is AlCoCrFeNi high-entropy alloy;
FIG. 2 shows AlCoCrFeNi high-entropy alloy and Al in the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1 3 Scanning electron microscope photos of Ti matrix interfaces;
FIG. 3 is a photograph showing the distribution of Al element in the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1;
FIG. 4 is a photograph of the distribution of Ti element in the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1;
FIG. 5 shows the phase position distribution of the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1;
FIG. 6 shows High Entropy Alloy (HEA) foil, Ti (TA1) foil, HEA enhanced Ti/Al 3 Ti layered composite material, Ti/Al 3 Polarization curve diagram of Ti laminated composite material;
FIG. 7 is a Vickers hardness test curve for a material;
FIG. 8 is a graph of tensile properties of a Ti-Al based layered composite material reinforced by AlCoCrFeNi high-entropy alloy particles prepared in example 2;
fig. 9 is an SEM image of the Ti — Al-based layered composite material reinforced by AlCoCrFeNi high entropy alloy particles prepared in example 2.
Detailed Description
The first embodiment is as follows: the method for enhancing the Ti-Al series layered composite material by utilizing the AlCoCrFeNi high-entropy alloy is completed according to the following steps:
firstly, respectively polishing Ti foil, Al foil and AlCoCrFeNi high-entropy alloy foil to remove an oxide layer on the surface, then ultrasonically cleaning, drying, and then, according to the following steps: sequentially stacking a Ti foil, an Al foil, an AlCoCrFeNi high-entropy alloy foil (AlCoCrFeNi high-entropy alloy particles), an Al foil and a Ti foil to form a unit; one or more units are stacked from bottom to top and then placed into a mold, and the mold filled with the material is placed into a vacuum hot-pressing furnace for vacuum hot-pressing sintering to obtain the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material.
The second embodiment is as follows: the present embodiment differs from the present embodiment in that: the Al foil was 1060 commercial aluminum and the Ti foil was a commercial TA1 alloy. Other steps are the same as in the first embodiment.
The third concrete implementation mode: the difference between this embodiment and the first or second embodiment is: the AlCoCrFeNi high-entropy alloy foil contains 23.3% of Co, 20.6% of Cr, 22.1% of Fe and 23.3% of Ni. The other steps are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is as follows: and respectively polishing the Ti foil, the Al foil and the AlCoCrFeNi high-entropy alloy foil by using 240-mesh, 600-mesh, 800-mesh, 1200-mesh and 2000-mesh sand paper in sequence. The other steps are the same as those in the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: the thickness of the Ti foil is 0.8 mm-1.0 mm. The other steps are the same as those in the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is as follows: the thickness of the Al foil is 0.5 mm-0.8 mm. The other steps are the same as those in the first to fifth embodiments.
The seventh embodiment: the difference between this embodiment and the first to sixth embodiments is: the thickness of the AlCoCrFeNi high-entropy alloy foil is 1.0-1.1 mm. The other steps are the same as those in the first to sixth embodiments.
The specific implementation mode is eight: the difference between this embodiment and one of the first to seventh embodiments is: the vacuum hot-pressing sintering process comprises the following steps: at 10 -3 And (2) under the vacuum degree of Pa, heating the vacuum hot-pressing furnace from room temperature to 540-550 ℃ at a specific heating rate, preserving heat, heating to 660-670 ℃ at the specific heating rate after preserving heat for a certain time, preserving heat, cooling to 400 ℃ at the specific cooling rate, and cooling to room temperature along with the furnace. The other steps are the same as those in the first to seventh embodiments.
The specific implementation method nine: the difference between this embodiment and the first to eighth embodiments is: the vacuum hot-pressing furnace keeps 2-4 MPa pressure in the process of heating from room temperature to 540-550 ℃ at a specific heating rate, keeps 2-4 MPa pressure in the heat preservation stage of 540-550 ℃, keeps 2-4 MPa pressure in the process of heating to 660-670 ℃ at a specific heating rate, keeps 0.1MPa pressure in the heat preservation stage of 660-670 ℃, and keeps 3MPa pressure in the process of cooling to 400 ℃ at a specific cooling rate. The other steps are the same as those in the first to eighth embodiments.
The specific implementation mode is ten: the difference between this embodiment and one of the first to ninth embodiments is as follows: the heating rate and the cooling rate are both 1 ℃/min-2 ℃/min; heating to 540-550 ℃ and keeping the temperature for 10-15 min; the temperature is raised to 660-670 ℃ and the heat preservation time is 5-6 h. The other steps are the same as those in the first to ninth embodiments.
The following examples were used to demonstrate the beneficial effects of the present invention:
example 1: a method for reinforcing a Ti-Al series layered composite material by utilizing an AlCoCrFeNi high-entropy alloy plate is completed according to the following steps:
the method comprises the following steps of chamfering 50mm multiplied by 50.5 mm Al foil, 0.8mm Ti foil and 1.0mm AlCoCrFeNi high-entropy alloy foil, sequentially polishing the Ti foil, the Al foil and the AlCoCrFeNi high-entropy alloy foil by using 240-mesh, 600-mesh, 800-mesh, 1200-mesh and 2000-mesh abrasive paper, removing an oxide layer and oil stains on the surface of a material, ensuring that a clean surface layer is exposed, fully covering scratches on the surface, then carrying out ultrasonic cleaning, putting the treated raw material into an ultrasonic cleaning machine filled with clear water for cleaning for 20min, putting the cleaned raw material into an ultrasonic cleaning machine filled with absolute ethyl alcohol for cleaning for 15min, then carrying out drying treatment on the cleaned raw material, and then carrying out the following steps: sequentially stacking a Ti foil, an Al foil, an AlCoCrFeNi high-entropy alloy foil, an Al foil and a Ti foil to form a unit; stacking the two units from bottom to top, putting the two units into a mold, and putting the mold filled with the materials into a vacuum hot-pressing furnace for vacuum hot-pressing sintering;
the Al foil is 1060 commercial aluminum, and the Ti foil is commercial TA1 alloy;
the used vacuum hot-pressing sintering process comprises the following steps: at 10 -3 Heating a vacuum hot-pressing furnace from room temperature to 550 ℃ at the heating rate of 2 ℃/min under the vacuum degree of Pa, keeping the pressure of 3MPa in the heating process, preserving heat for 10min at 550 ℃, keeping the pressure of 3MPa in the heat preservation process at 550 ℃, then heating from 550 ℃ to 670 ℃ at the heating rate of 1 ℃/min, keeping the pressure of 3MPa in the heating process, preserving heat for 6h at 670 ℃, keeping the pressure of 0.1MPa in the heat preservation process at 670 ℃, then cooling to 400 ℃ at the cooling rate of 2 ℃/min, keeping the pressure of 3MPa in the cooling process, and finally cooling to room temperature along with the furnace to obtain the Ti-Al system (Ti/Al) enhanced by the AlCoCrFeNi high-entropy alloy plate 3 Ti) layered composite material (HEA reinforced Ti/Al) 3 Ti layered composite).
FIG. 2 shows AlCoCrFeNi high-entropy alloy and Al in the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1 3 Scanning electron microscope photos of Ti matrix interface;
as can be seen from FIG. 2, the interlayer bonding quality is high, there is significant delamination, there is significant centerline, and there are also minor cracksThe collision among the primary phases does not influence the performance of the material, and the inhibition can be realized by optimizing the preparation process; AlCoCrFeNi high-entropy alloy foil and Al 3 A reaction zone is arranged between the Ti matrixes and is generated by the reaction of AlCoCrFeNi high-entropy alloy and Al, the interface layer has high hardness and high strength, and trace cracks are generated; energy spectrum analysis and XRD analysis show that the AlCoCrFeNi high-entropy alloy foil is remained, so that the composite material prepared by the preparation method of the embodiment well keeps the performance of the AlCoCrFeNi high-entropy alloy foil, and the composite material integrally has high toughness.
FIG. 3 is a photograph showing the distribution of Al element in the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1;
FIG. 4 is a photograph showing the distribution of Ti in the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1;
the distribution of the elements in the material can be clearly seen from fig. 3 and 4.
FIG. 5 shows the phase position distribution of the Ti-Al layered composite material reinforced by the AlCoCrFeNi high-entropy alloy sheet prepared in example 1;
XRD analysis and EDS analysis show that the material after the reaction is completed is basically made of Ti and Al 3 Ti, AlCoCrFeNi + Al (two-phase region).
FIG. 6 shows High Entropy Alloy (HEA) foil, Ti (TA1) foil, HEA-reinforced Ti/Al 3 Ti layered composite material, Ti/Al 3 Polarization curve diagram of Ti laminated composite material;
the corrosion performance of the Ti-Al series layered composite material reinforced by the AlCoCrFeNi high-entropy alloy plate prepared in the embodiment 1 is as follows: by using the configured three-electrode system, the reference electrode is an Ag/AgCl electrode, the auxiliary electrode is a platinum electrode, the VMP3 electrochemical workstation is used for testing the corrosion resistance of the experimental material and the experimental raw material at the room temperature of 23 ℃, and the following data are obtained through the test and are shown in Table 1;
TABLE 1
The electrochemical corrosion test carried out in NaCl solution proves that the high-entropy alloy plate enhances Ti/Al 3 Corrosion potential ratio of Ti-layered composite material Ti/Al 3 The Ti layered composite material is high, and the higher the corrosion potential is, the better the corrosion resistance is. Therefore, the prepared material has corrosion resistance higher than that of Ti/Al 3 The Ti laminated composite material is improved.
FIG. 7 is a Vickers hardness test curve for a material;
from the Vickers hardness test curve of FIG. 7, it can be seen that the high-entropy alloy plate enhances Ti/Al 3 The hardness of the Ti layered composite material is periodically changed due to the layered structure, the highest hardness appears in the high-entropy alloy layer, and the hardness value is 882-897 HV; formed Al 3 The average hardness of Ti was 552 HV.
The longitudinal compressive strength of the material prepared from the AlCoCrFeNi high-entropy alloy plate reinforced Ti-Al series layered composite material prepared in the embodiment 1 is 1006 MPa.
Example 2: a method for reinforcing a Ti-Al series layered composite material by utilizing AlCoCrFeNi high-entropy alloy particles is completed according to the following steps:
50mm x 0.5mm Al foil and 0.8mm Ti foil are chamfered, 240-mesh, 600-mesh, 800-mesh, 1200-mesh and 2000-mesh abrasive paper is sequentially used for polishing the Ti foil and the Al foil respectively to remove an oxide layer and oil stains on the surface of the material and ensure that a clean surface layer is exposed, the surface is fully covered with scratches, then ultrasonic cleaning is carried out, the treated raw material is put into an ultrasonic cleaning machine filled with clear water for cleaning, the cleaning time is 20min, after the cleaning is finished, the raw material is put into an ultrasonic cleaning machine filled with absolute ethyl alcohol for cleaning for 15min, then the cleaned raw material is dried, and the steps are as follows: sequentially stacking a Ti foil, an Al foil, AlCoCrFeNi high-entropy alloy particles, the Al foil and the Ti foil to form a unit; stacking the two units from bottom to top, putting the two units into a mold, and putting the mold filled with the materials into a vacuum hot-pressing furnace for vacuum hot-pressing sintering;
the Al foil is 1060 commercial aluminum, and the Ti foil is commercial TA1 alloy;
the used vacuum hot-pressing sintering process comprises the following steps: at 10 -3 And (2) heating the vacuum hot-pressing furnace from room temperature to 550 ℃ at the heating rate of 2 ℃/min under the vacuum degree of Pa, keeping the pressure of 3MPa in the heating process, preserving the heat at 550 ℃ for 10min, keeping the pressure of 3MPa in the heat preservation process at 550 ℃, then heating from 550 ℃ to 660 ℃ at the heating rate of 1 ℃/min, keeping the pressure of 3MPa in the heating process, preserving the heat at 660 ℃ for 6h, keeping the pressure of 0.1MPa in the heat preservation process at 660 ℃, then cooling to 400 ℃ at the cooling rate of 2 ℃/min, keeping the pressure of 3MPa in the cooling process, and finally cooling to the room temperature along with the furnace to obtain the Ti-Al series layered composite material reinforced by the AlCoCrFeNi high-entropy alloy particles.
FIG. 8 is a graph of tensile properties of a Ti-Al based layered composite material reinforced by AlCoCrFeNi high-entropy alloy particles prepared in example 2;
as can be seen from FIG. 8, the average elongation at break of the Ti-Al layered composite material reinforced by AlCoCrFeNi high-entropy alloy particles prepared in example 2 is 40.61%, which is higher than that of Al 3 4.2% of Ti, exhibits good plastic deformability.
FIG. 9 is an SEM image of a Ti-Al series layered composite material reinforced by AlCoCrFeNi high-entropy alloy particles prepared in example 2;
as can be seen in fig. 9: the prepared material has obvious layering phenomenon, compact structure and no obvious defect.
The compressive strength of the Ti-Al series layered composite material reinforced by the AlCoCrFeNi high-entropy alloy particles prepared in the embodiment 2 in the direction perpendicular to the lamination direction is 490 MPa.
Claims (10)
1. A method for enhancing Ti-Al series layered composite material by utilizing AlCoCrFeNi high-entropy alloy is characterized by comprising the following steps:
firstly, respectively polishing Ti foil, Al foil and AlCoCrFeNi high-entropy alloy foil to remove an oxide layer on the surface, then ultrasonically cleaning, drying, and then, according to the following steps: sequentially stacking a Ti foil, an Al foil, an AlCoCrFeNi high-entropy alloy foil (AlCoCrFeNi high-entropy alloy particles), an Al foil and a Ti foil to form a unit; one or more units are stacked from bottom to top and then placed into a mold, and the mold filled with the material is placed into a vacuum hot-pressing furnace for vacuum hot-pressing sintering to obtain the AlCoCrFeNi high-entropy alloy reinforced Ti-Al series layered composite material.
2. The method for reinforcing the Ti-Al series layered composite material by using the AlCoCrFeNi high-entropy alloy as claimed in claim 1, wherein the Al foil is 1060 commercial aluminum, and the Ti foil is commercial TA1 alloy.
3. The method for reinforcing the Ti-Al layered composite material by using the AlCoCrFeNi high-entropy alloy plate as claimed in claim 1, wherein the AlCoCrFeNi high-entropy alloy foil contains 23.3% of Co, 20.6% of Cr, 22.1% of Fe and 23.3% of Ni.
4. The method for enhancing the Ti-Al series layered composite material by utilizing the AlCoCrFeNi high-entropy alloy as claimed in claim 1, wherein the Ti foil, the Al foil and the AlCoCrFeNi high-entropy alloy foil are respectively polished by using 240-mesh, 600-mesh, 800-mesh, 1200-mesh and 2000-mesh sandpaper in sequence.
5. The method for reinforcing the Ti-Al layered composite material by using the AlCoCrFeNi high-entropy alloy as claimed in claim 1, wherein the thickness of the Ti foil is 0.8 mm-1.0 mm.
6. The method for reinforcing the Ti-Al layered composite material by using the AlCoCrFeNi high-entropy alloy as claimed in claim 1, wherein the thickness of the Al foil is 0.5mm to 0.8 mm.
7. The method for reinforcing the Ti-Al layered composite material by using the AlCoCrFeNi high-entropy alloy as claimed in claim 1, wherein the thickness of the AlCoCrFeNi high-entropy alloy foil is 1.0-1.1 mm.
8. The method for enhancing the Ti-Al series layered composite material by utilizing the AlCoCrFeNi high-entropy alloy as claimed in claim 1, wherein the vacuum hot-pressing sintering process comprises the following steps: at 10 -3 And (2) under the vacuum degree of Pa, heating the vacuum hot-pressing furnace from room temperature to 540-550 ℃ at a specific heating rate, preserving heat, heating to 660-670 ℃ at the specific heating rate after preserving heat for a certain time, preserving heat, cooling to 400 ℃ at the specific cooling rate, and cooling to room temperature along with the furnace.
9. The method of claim 8, wherein the pressure of 2MPa to 4MPa is maintained in the vacuum autoclave during the temperature increase from room temperature to 540 ℃ to 550 ℃ at a specific temperature increase rate, the pressure of 2MPa to 4MPa is maintained in the temperature preservation stage at 540 ℃ to 550 ℃, the pressure of 2MPa to 4MPa is maintained during the temperature increase to 660 ℃ to 670 ℃ at a specific temperature increase rate, the pressure of 0.1MPa is maintained in the temperature preservation stage at 660 ℃ to 670 ℃, and the pressure of 3MPa is maintained during the temperature decrease to 400 ℃ at a specific temperature decrease rate.
10. The method for enhancing the Ti-Al series layered composite material by utilizing the AlCoCrFeNi high-entropy alloy as claimed in claim 8, wherein the temperature rise rate and the temperature decrease rate are both 1 ℃/min to 2 ℃/min; heating to 540-550 ℃ and keeping the temperature for 10-15 min; the temperature is raised to 660-670 ℃ and the heat preservation time is 5-6 h.
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